Vehicle plows into crowd on Bourbon St., with 14 fatalities

I don't get the timing. Unless he was thinking it would be easy to drive down to St Ann where the other ied's were at 0345. Why would he want to be where the other were left? Wanting to visualize target before remote det?
I read somewhere else (nothing official so take with grain of salt) that people moving the coolers and interfering is what messed up his timing.